Top 200+ Java J2EE Interview Questions and Answers - 4

Question: 16

What is point-to-point messaging system?

A messaging system built on the concept of message queues. Each message is addressed to a specific queue; clients extract messages from the queues established to hold their messages.

Question: 17

What is request response messaging?

A method of messaging that includes blocking until a response is received.

A system level software driver that is used by an EJB container of an application client to connect to an enterprise information system. A resource adapter typically is specific to an enterprise information system. It is available as a library and is used within the address space of the server or client using it. A resource adapter plugs in to a container. The application components deployed on the container then use the client API or tool generated high level abstractions to access the underlying enterprise information system. The resource adapter and EJB container collaborate to provide the underlying mechanisms transactions, security and connection pooling for connectivity to the enterprise information system.

Question: 18

What is resource adapter module?

A deployable unit that contains all Java interfaces, classes and native libraries, implementing a resource adapter along with the resource adapter deployment descriptor.

Question: 19

What is Web application, distributable?

A Web application that uses J2EE technology written so that it can be deployed in a Web container distributed across multiple Java virtual machines running on the same host or different hosts. The deployment descriptor for such an application uses the distributable element.

Question: 20

What is bean managed transaction?

A transaction whose boundaries are defined by an enterprise bean.